Professor Witold Respondek was born in Poland. He received his Ph.D. degree form the Institute of Mathematics, Polish Academy of Sciences in 1981. He has had positions at the Technical University of Warsaw and at the Polish Academy of Sciences. Since 1994 he has been a professor of applied mathematics at the INSA de Rouen, France. General areas of his scientific interest are geometric methods in systems and control theory as well as geometric methods in differential equations. His research papers have been devoted to problems of linearization of nonlinear control systems, nonlinear observers, classification of control systems and vector distributions, dynamic feedback, applications of high-gain feedback to nonlinear systems, and systems invariant on cones. Recently he has been working on mechanical control systems and on flatness, with particular emphasis on systems with nonholonomic constraints, and on geometry of optimal control problems. He has been an associated editor of SIAM Journal on Control and Optimization, Applicationes Mathematicae, Central European Journal of Mathematics, and Journal of Geometric Mechanics. He is an editor of six books and author or co-author of more than 100 journal and conference papers.